{% extends 'base.html' %}
{% block title %}修改内容{% endblock %}
{% block body %}
<div id="div1" style="margin-top: 70px">
<form method="post" action="{{ url_for('update') }}">
  <textarea placeholder="{{ a }}" rows=5 cols=50 name="modify"></textarea>
  <input type="submit" value="修改内容">
</form>
</div>
{% endblock %}